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<meta name="description" content="清楚浮动（重点）方法1：给浮动的元素的祖先元素加高度12如果一个元素要浮动，那么它的祖先元素一定要有高度。高度的盒子，才能关住浮动。只要浮动在一个有高度的盒子中，那么这个浮动就不会影响后面的浮动元素。所以就是清除浮动带来的影响了。  方法2：clear:both12网页制作中，高度height很少出现。为什么？因为能被内容撑高！那也就是说，刚才我们讲解的方法1，工作中用的很少。所以可以采用  cl">
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        <h2 id="&#x6E05;&#x695A;&#x6D6E;&#x52A8;&#xFF08;&#x91CD;&#x70B9;&#xFF09;"><a href="#&#x6E05;&#x695A;&#x6D6E;&#x52A8;&#xFF08;&#x91CD;&#x70B9;&#xFF09;" class="headerlink" title="&#x6E05;&#x695A;&#x6D6E;&#x52A8;&#xFF08;&#x91CD;&#x70B9;&#xFF09;"></a>&#x6E05;&#x695A;&#x6D6E;&#x52A8;&#xFF08;&#x91CD;&#x70B9;&#xFF09;</h2><h3 id="&#x65B9;&#x6CD5;1&#xFF1A;&#x7ED9;&#x6D6E;&#x52A8;&#x7684;&#x5143;&#x7D20;&#x7684;&#x7956;&#x5148;&#x5143;&#x7D20;&#x52A0;&#x9AD8;&#x5EA6;"><a href="#&#x65B9;&#x6CD5;1&#xFF1A;&#x7ED9;&#x6D6E;&#x52A8;&#x7684;&#x5143;&#x7D20;&#x7684;&#x7956;&#x5148;&#x5143;&#x7D20;&#x52A0;&#x9AD8;&#x5EA6;" class="headerlink" title="&#x65B9;&#x6CD5;1&#xFF1A;&#x7ED9;&#x6D6E;&#x52A8;&#x7684;&#x5143;&#x7D20;&#x7684;&#x7956;&#x5148;&#x5143;&#x7D20;&#x52A0;&#x9AD8;&#x5EA6;"></a>&#x65B9;&#x6CD5;1&#xFF1A;&#x7ED9;&#x6D6E;&#x52A8;&#x7684;&#x5143;&#x7D20;&#x7684;&#x7956;&#x5148;&#x5143;&#x7D20;&#x52A0;&#x9AD8;&#x5EA6;</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">&#x5982;&#x679C;&#x4E00;&#x4E2A;&#x5143;&#x7D20;&#x8981;&#x6D6E;&#x52A8;&#xFF0C;&#x90A3;&#x4E48;&#x5B83;&#x7684;&#x7956;&#x5148;&#x5143;&#x7D20;&#x4E00;&#x5B9A;&#x8981;&#x6709;&#x9AD8;&#x5EA6;&#x3002;&#x9AD8;&#x5EA6;&#x7684;&#x76D2;&#x5B50;&#xFF0C;&#x624D;&#x80FD;&#x5173;&#x4F4F;&#x6D6E;&#x52A8;&#x3002;&#x53EA;&#x8981;&#x6D6E;&#x52A8;&#x5728;</span><br><span class="line">&#x4E00;&#x4E2A;&#x6709;&#x9AD8;&#x5EA6;&#x7684;&#x76D2;&#x5B50;&#x4E2D;&#xFF0C;&#x90A3;&#x4E48;&#x8FD9;&#x4E2A;&#x6D6E;&#x52A8;&#x5C31;&#x4E0D;&#x4F1A;&#x5F71;&#x54CD;&#x540E;&#x9762;&#x7684;&#x6D6E;&#x52A8;&#x5143;&#x7D20;&#x3002;&#x6240;&#x4EE5;&#x5C31;&#x662F;&#x6E05;&#x9664;&#x6D6E;&#x52A8;&#x5E26;&#x6765;&#x7684;&#x5F71;&#x54CD;&#x4E86;&#x3002;</span><br></pre></td></tr></table></figure>
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<h3 id="&#x65B9;&#x6CD5;2&#xFF1A;clear-both"><a href="#&#x65B9;&#x6CD5;2&#xFF1A;clear-both" class="headerlink" title="&#x65B9;&#x6CD5;2&#xFF1A;clear:both"></a>&#x65B9;&#x6CD5;2&#xFF1A;clear:both</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">&#x7F51;&#x9875;&#x5236;&#x4F5C;&#x4E2D;&#xFF0C;&#x9AD8;&#x5EA6;height&#x5F88;&#x5C11;&#x51FA;&#x73B0;&#x3002;&#x4E3A;&#x4EC0;&#x4E48;&#xFF1F;&#x56E0;&#x4E3A;&#x80FD;&#x88AB;&#x5185;&#x5BB9;&#x6491;&#x9AD8;&#xFF01;&#x90A3;&#x4E5F;&#x5C31;&#x662F;&#x8BF4;&#xFF0C;&#x521A;&#x624D;&#x6211;&#x4EEC;&#x8BB2;&#x89E3;&#x7684;&#x65B9;&#x6CD5;1&#xFF0C;&#x5DE5;&#x4F5C;&#x4E2D;&#x7528;&#x7684;&#x5F88;&#x5C11;&#x3002;</span><br><span class="line">&#x6240;&#x4EE5;&#x53EF;&#x4EE5;&#x91C7;&#x7528;  clear:both &#x8FD9;&#x4E2A;&#x5C5E;&#x6027;&#x6E05;&#x9664;&#x6D6E;&#x52A8;&#x3002;</span><br></pre></td></tr></table></figure>
<p>&#x8FD9;&#x79CD;&#x65B9;&#x6CD5;&#x6709;&#x4E00;&#x4E2A;&#x975E;&#x5E38;&#x5927;&#x7684;&#x3001;&#x81F4;&#x547D;&#x7684;&#x95EE;&#x9898;&#xFF0C;margin&#x4F1A;&#x5931;&#x6548;&#x3002;<br><a id="more"></a></p>
<h3 id="&#x65B9;&#x6CD5;3&#xFF1A;&#x9694;&#x5899;&#x6CD5;"><a href="#&#x65B9;&#x6CD5;3&#xFF1A;&#x9694;&#x5899;&#x6CD5;" class="headerlink" title="&#x65B9;&#x6CD5;3&#xFF1A;&#x9694;&#x5899;&#x6CD5;"></a>&#x65B9;&#x6CD5;3&#xFF1A;&#x9694;&#x5899;&#x6CD5;</h3><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">div</span> <span class="attr">class</span>=<span class="string">&quot;box1&quot;</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;<span class="name">ul</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">li</span>&gt;</span>HTML<span class="tag">&lt;/<span class="name">li</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">li</span>&gt;</span>CSS<span class="tag">&lt;/<span class="name">li</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">li</span>&gt;</span>JS<span class="tag">&lt;/<span class="name">li</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">li</span>&gt;</span>HTML5<span class="tag">&lt;/<span class="name">li</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">li</span>&gt;</span>&#x8BBE;&#x8BA1;&#x6A21;&#x5F0F;<span class="tag">&lt;/<span class="name">li</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;/<span class="name">ul</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br><span class="line">	</span><br><span class="line">	<span class="tag">&lt;<span class="name">div</span> <span class="attr">class</span>=<span class="string">&quot;cl h16&quot;</span>&gt;</span><span class="tag">&lt;/<span class="name">div</span>&gt;</span> //&#x8FD9;&#x5C31;&#x662F;&#x5899;</span><br><span class="line">	</span><br><span class="line"><span class="tag">&lt;<span class="name">div</span> <span class="attr">class</span>=<span class="string">&quot;box2&quot;</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;<span class="name">ul</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">li</span>&gt;</span>&#x5B66;&#x4E60;&#x65B9;&#x6CD5;<span class="tag">&lt;/<span class="name">li</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">li</span>&gt;</span>&#x82F1;&#x8BED;&#x6C34;&#x5E73;<span class="tag">&lt;/<span class="name">li</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">li</span>&gt;</span>&#x9762;&#x8BD5;&#x6280;&#x5DE7;<span class="tag">&lt;/<span class="name">li</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;/<span class="name">ul</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br><span class="line"></span><br><span class="line">	.cl{</span><br><span class="line">		clear: both;</span><br><span class="line">	}</span><br><span class="line">	.h16{</span><br><span class="line">		height: 16px;6	}</span><br></pre></td></tr></table></figure>
<p>&#x5899;&#x53C8;&#x5206;&#x4E3A;&#x5185;&#x5899;&#x548C;&#x5916;&#x5899;&#xFF0C;&#x4E0A;&#x9762;&#x7684;&#x4EE3;&#x7801;&#x5C31;&#x662F;&#x5916;&#x5899;&#x6CD5;&#x3002;<br>&#x5916;&#x5899;&#xFF1A;<br><img src="http://ohe49035j.bkt.clouddn.com/html4.png" alt=""><br>&#x5185;&#x5899;&#xFF1A;<br><img src="http://ohe49035j.bkt.clouddn.com/html5.png" alt=""></p>
<h3 id="&#x65B9;&#x6CD5;4&#xFF1A;overflow-hidden"><a href="#&#x65B9;&#x6CD5;4&#xFF1A;overflow-hidden" class="headerlink" title="&#x65B9;&#x6CD5;4&#xFF1A;overflow:hidden"></a>&#x65B9;&#x6CD5;4&#xFF1A;overflow:hidden</h3><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">overflow:hidden;</span><br><span class="line">&#x4E00;&#x4E2A;&#x7236;&#x4EB2;&#x4E0D;&#x80FD;&#x88AB;&#x81EA;&#x5DF1;&#x6D6E;&#x52A8;&#x7684;&#x513F;&#x5B50;&#xFF0C;&#x6491;&#x51FA;&#x9AD8;&#x5EA6;&#x3002;&#x4F46;&#x662F;&#xFF0C;&#x53EA;&#x8981;&#x7ED9;&#x7236;&#x4EB2;&#x52A0;&#x4E0A;overflow:hidden; &#x90A3;&#x4E48;&#xFF0C;&#x7236;&#x4EB2;&#x5C31;&#x80FD;&#x88AB;&#x513F;&#x5B50;&#x6491;&#x51FA;&#x9AD8;&#x4E86;&#x3002;&#x8FD9;&#x662F;&#x4E00;&#x4E2A;&#x504F;&#x65B9;</span><br></pre></td></tr></table></figure>
<p><img src="http://ohe49035j.bkt.clouddn.com/html6.png" alt=""></p>
<h2 id="&#x4F2A;&#x7C7B;"><a href="#&#x4F2A;&#x7C7B;" class="headerlink" title="&#x4F2A;&#x7C7B;"></a>&#x4F2A;&#x7C7B;</h2><p>&#x540C;&#x4E00;&#x4E2A;&#x6807;&#x7B7E;&#xFF0C;&#x6839;&#x636E;&#x7528;&#x6237;&#x7684;&#x67D0;&#x79CD;&#x72B6;&#x6001;&#x4E0D;&#x540C;&#xFF0C;&#x6709;&#x4E0D;&#x540C;&#x7684;&#x6837;&#x5F0F;&#x3002;&#x8FD9;&#x5C31;&#x53EB;&#x505A;&#x201C;&#x4F2A;&#x7C7B;&#x201D;&#x3002;<br><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">:link  	&#x8868;&#x793A;&#xFF0C; &#x7528;&#x6237;&#x6CA1;&#x6709;&#x70B9;&#x51FB;&#x8FC7;&#x8FD9;&#x4E2A;&#x94FE;&#x63A5;&#x7684;&#x6837;&#x5F0F;&#x3002; &#x662F;&#x82F1;&#x8BED;&#x201C;&#x94FE;&#x63A5;&#x201D;&#x7684;&#x610F;&#x601D;&#x3002;</span><br><span class="line">:visited	&#x8868;&#x793A;&#xFF0C; &#x7528;&#x6237;&#x8BBF;&#x95EE;&#x8FC7;&#x4E86;&#x8FD9;&#x4E2A;&#x94FE;&#x63A5;&#x7684;&#x6837;&#x5F0F;&#x3002; &#x662F;&#x82F1;&#x8BED;&#x201C;&#x8BBF;&#x95EE;&#x8FC7;&#x7684;&#x201D;&#x7684;&#x610F;&#x601D;&#x3002;</span><br><span class="line">:hover	&#x8868;&#x793A;&#xFF0C; &#x7528;&#x6237;&#x9F20;&#x6807;&#x60AC;&#x505C;&#x7684;&#x65F6;&#x5019;&#x94FE;&#x63A5;&#x7684;&#x6837;&#x5F0F;&#x3002; &#x662F;&#x82F1;&#x8BED;&#x201C;&#x60AC;&#x505C;&#x201D;&#x7684;&#x610F;&#x601D;&#x3002;</span><br><span class="line">:active	&#x8868;&#x793A;&#xFF0C; &#x7528;&#x6237;&#x7528;&#x9F20;&#x6807;&#x70B9;&#x51FB;&#x8FD9;&#x4E2A;&#x94FE;&#x63A5;&#xFF0C;&#x4F46;&#x662F;&#x4E0D;&#x677E;&#x624B;&#xFF0C;&#x6B64;&#x523B;&#x7684;&#x6837;&#x5F0F;&#x3002; &#x662F;&#x82F1;&#x8BED;&#x201C;&#x6FC0;&#x6D3B;&#x201D;&#x7684;&#x610F;&#x601D;&#x3002;</span><br></pre></td></tr></table></figure></p>
<p>&#x8BB0;&#x4F4F;&#xFF0C;&#x8FD9;&#x56DB;&#x79CD;&#x72B6;&#x6001;&#xFF0C;&#x5728;css&#x4E2D;&#xFF0C;&#x5FC5;&#x987B;&#x6309;&#x7167;&#x56FA;&#x5B9A;&#x7684;&#x987A;&#x5E8F;&#x5199;&#xFF1A;<br>a:link &#x3001;a:visited &#x3001;a:hover &#x3001;a:active<br>&#x5982;&#x679C;&#x4E0D;&#x6309;&#x7167;&#x987A;&#x5E8F;&#xFF0C;&#x90A3;&#x4E48;&#x5C06;&#x5931;&#x6548;&#x3002;&#x201C;&#x7231;&#x6068;&#x51C6;&#x5219;&#x201D;love hate&#x3002;&#x5FC5;&#x987B;&#x5148;&#x7231;&#xFF0C;&#x540E;&#x6068;&#x3002;</p>
<h2 id="&#x5B9A;&#x4F4D;"><a href="#&#x5B9A;&#x4F4D;" class="headerlink" title="&#x5B9A;&#x4F4D;"></a>&#x5B9A;&#x4F4D;</h2><h3 id="&#x76F8;&#x5BF9;&#x5B9A;&#x4F4D;"><a href="#&#x76F8;&#x5BF9;&#x5B9A;&#x4F4D;" class="headerlink" title="&#x76F8;&#x5BF9;&#x5B9A;&#x4F4D;"></a>&#x76F8;&#x5BF9;&#x5B9A;&#x4F4D;</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">&#x76F8;&#x5BF9;&#x5B9A;&#x4F4D;&#xFF0C;&#x5C31;&#x662F;&#x5FAE;&#x8C03;&#x5143;&#x7D20;&#x4F4D;&#x7F6E;&#x7684;&#x3002;&#x8BA9;&#x5143;&#x7D20;&#x76F8;&#x5BF9;&#x81EA;&#x5DF1;&#x539F;&#x6765;&#x7684;&#x4F4D;&#x7F6E;&#xFF0C;&#x8FDB;&#x884C;&#x4F4D;&#x7F6E;&#x8C03;&#x6574;&#x3002;</span><br><span class="line">&#x76F8;&#x5BF9;&#x5B9A;&#x4F4D;&#x4E0D;&#x8131;&#x6807;&#xFF0C;&#x771F;&#x5B9E;&#x4F4D;&#x7F6E;&#x662F;&#x5728;&#x8001;&#x5BB6;&#xFF0C;&#x53EA;&#x4E0D;&#x8FC7;&#x5F71;&#x5B50;&#x51FA;&#x53BB;&#x4E86;&#xFF0C;&#x53EF;&#x4EE5;&#x5230;&#x5904;&#x98D8;.</span><br></pre></td></tr></table></figure>
<p>&#x4F5C;&#x7528; </p>
<ul>
<li>&#x5FAE;&#x8C03;&#x5143;&#x7D20;</li>
<li>&#x505A;&#x7EDD;&#x5BF9;&#x5B9A;&#x4F4D;&#x7684;&#x53C2;&#x8003;&#xFF0C;&#x5B50;&#x7EDD;&#x7236;&#x76F8;<h3 id="&#x7EDD;&#x5BF9;&#x5B9A;&#x4F4D;"><a href="#&#x7EDD;&#x5BF9;&#x5B9A;&#x4F4D;" class="headerlink" title="&#x7EDD;&#x5BF9;&#x5B9A;&#x4F4D;"></a>&#x7EDD;&#x5BF9;&#x5B9A;&#x4F4D;</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">&#x7EDD;&#x5BF9;&#x5B9A;&#x4F4D;&#x7684;&#x76D2;&#x5B50;&#xFF0C;&#x662F;&#x8131;&#x79BB;&#x6807;&#x51C6;&#x6587;&#x6863;&#x6D41;&#x7684;&#x3002;&#x6240;&#x4EE5;&#xFF0C;&#x6240;&#x6709;&#x7684;&#x6807;&#x51C6;&#x6587;&#x6863;&#x6D41;&#x7684;&#x6027;&#x8D28;&#xFF0C;&#x7EDD;&#x5BF9;&#x5B9A;&#x4F4D;&#x4E4B;&#x540E;&#x90FD;&#x4E0D;&#x9075;&#x5B88;&#x4E86;&#x3002;</span><br><span class="line">&#x7EDD;&#x5BF9;&#x5B9A;&#x4F4D;&#x4E4B;&#x540E;&#xFF0C;&#x6807;&#x7B7E;&#x5C31;&#x4E0D;&#x533A;&#x5206;&#x6240;&#x8C13;&#x7684;&#x884C;&#x5185;&#x5143;&#x7D20;&#x3001;&#x5757;&#x7EA7;&#x5143;&#x7D20;&#x4E86;&#xFF0C;&#x4E0D;&#x9700;&#x8981;display:block;&#x5C31;&#x53EF;&#x4EE5;&#x8BBE;&#x7F6E;&#x5BBD;&#x3001;&#x9AD8;&#x4E86;.</span><br><span class="line">&#x4E00;&#x4E2A;&#x7EDD;&#x5BF9;&#x5B9A;&#x4F4D;&#x7684;&#x5143;&#x7D20;&#xFF0C;&#x5982;&#x679C;&#x7236;&#x8F88;&#x5143;&#x7D20;&#x4E2D;&#x51FA;&#x73B0;&#x4E86;&#x4E5F;&#x5B9A;&#x4F4D;&#x4E86;&#x7684;&#x5143;&#x7D20;&#xFF0C;&#x90A3;&#x4E48;&#x5C06;&#x4EE5;&#x7236;&#x8F88;&#x8FD9;&#x4E2A;&#x5143;&#x7D20;&#xFF0C;&#x4E3A;&#x53C2;&#x8003;&#x70B9;&#x3002;(&#x81EA;&#x7EDD;&#x7236;&#x76F8;)</span><br><span class="line">&#x7EDD;&#x5BF9;&#x5B9A;&#x4F4D;&#x4E4B;&#x540E;&#xFF0C;&#x6240;&#x6709;&#x6807;&#x51C6;&#x6D41;&#x7684;&#x89C4;&#x5219;&#xFF0C;&#x90FD;&#x4E0D;&#x9002;&#x7528;&#x4E86;&#x3002;&#x6240;&#x4EE5;margin:0 auto;&#x5931;&#x6548;&#x3002;</span><br><span class="line">&#x5C45;&#x4E2D;&#xFF1A;left:50%; margin-left:&#x8D1F;&#x7684;&#x5BBD;&#x5EA6;&#x7684;&#x4E00;&#x534A;&#x3002;</span><br></pre></td></tr></table></figure>
</li>
</ul>
<h3 id="&#x56FA;&#x5B9A;&#x5B9A;&#x4F4D;"><a href="#&#x56FA;&#x5B9A;&#x5B9A;&#x4F4D;" class="headerlink" title="&#x56FA;&#x5B9A;&#x5B9A;&#x4F4D;"></a>&#x56FA;&#x5B9A;&#x5B9A;&#x4F4D;</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">&#x56FA;&#x5B9A;&#x5B9A;&#x4F4D;&#xFF0C;&#x5C31;&#x662F;&#x76F8;&#x5BF9;&#x6D4F;&#x89C8;&#x5668;&#x7A97;&#x53E3;&#x5B9A;&#x4F4D;&#x3002;&#x9875;&#x9762;&#x5982;&#x4F55;&#x6EDA;&#x52A8;&#xFF0C;&#x8FD9;&#x4E2A;&#x76D2;&#x5B50;&#x663E;&#x793A;&#x7684;&#x4F4D;&#x7F6E;&#x4E0D;&#x53D8;&#x3002;</span><br><span class="line">&#x56FA;&#x5B9A;&#x5B9A;&#x4F4D;&#x8131;&#x6807;&#xFF01;</span><br></pre></td></tr></table></figure>
<h3 id="z-index"><a href="#z-index" class="headerlink" title="z-index"></a>z-index</h3><ul>
<li>z-index&#x503C;&#x8868;&#x793A;&#x8C01;&#x538B;&#x7740;&#x8C01;&#x3002;&#x6570;&#x503C;&#x5927;&#x7684;&#x538B;&#x76D6;&#x4F4F;&#x6570;&#x503C;&#x5C0F;&#x7684;&#x3002;</li>
<li>&#x53EA;&#x6709;&#x5B9A;&#x4F4D;&#x4E86;&#x7684;&#x5143;&#x7D20;&#xFF0C;&#x624D;&#x80FD;&#x6709;z-index&#x503C;&#x3002;&#x4E5F;&#x5C31;&#x662F;&#x8BF4;&#xFF0C;&#x4E0D;&#x7BA1;&#x76F8;&#x5BF9;&#x5B9A;&#x4F4D;&#x3001;&#x7EDD;&#x5BF9;&#x5B9A;&#x4F4D;&#x3001;&#x56FA;&#x5B9A;&#x5B9A;&#x4F4D;&#xFF0C;&#x90FD;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;z-index&#x503C;&#x3002;&#x800C;&#x6D6E;&#x52A8;&#x7684;&#x4E1C;&#x897F;&#x4E0D;&#x80FD;&#x7528;&#x3002;</li>
<li>z-index&#x503C;&#x6CA1;&#x6709;&#x5355;&#x4F4D;&#xFF0C;&#x5C31;&#x662F;&#x4E00;&#x4E2A;&#x6B63;&#x6574;&#x6570;&#x3002;&#x9ED8;&#x8BA4;&#x7684;z-index&#x503C;&#x662F;0&#x3002;</li>
<li>&#x5982;&#x679C;&#x5927;&#x5BB6;&#x90FD;&#x6CA1;&#x6709;z-index&#x503C;&#xFF0C;&#x6216;&#x8005;z-index&#x503C;&#x4E00;&#x6837;&#xFF0C;&#x90A3;&#x4E48;&#x8C01;&#x5199;&#x5728;HTML&#x540E;&#x9762;&#xFF0C;&#x8C01;&#x5728;&#x4E0A;&#x9762;&#x80FD;&#x538B;&#x4F4F;&#x522B;&#x4EBA;&#x3002;&#x5B9A;&#x4F4D;&#x4E86;&#x7684;&#x5143;&#x7D20;&#xFF0C;&#x6C38;&#x8FDC;&#x80FD;&#x591F;&#x538B;&#x4F4F;&#x6CA1;&#x6709;&#x5B9A;&#x4F4D;&#x7684;&#x5143;&#x7D20;&#x3002;</li>
<li>&#x4ECE;&#x7236;&#x73B0;&#x8C61;&#xFF1A;&#x7236;&#x4EB2;&#x6002;&#x4E86;&#xFF0C;&#x513F;&#x5B50;&#x518D;&#x725B;&#x903C;&#x4E5F;&#x6CA1;&#x7528;</li>
<li>&#x6CA1;&#x6709;&#x5355;&#x4F4D;</li>
</ul>
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    // monitor main search box;

    function proceedsearch() {
      $("body").append('<div class="popoverlay">').css('overflow', 'hidden');
      $('.popup').toggle();
    }
    // search function;
    var searchFunc = function(path, search_id, content_id) {
      'use strict';
      $.ajax({
        url: path,
        dataType: "xml",
        async: true,
        success: function( xmlResponse ) {
          // get the contents from search data
          isfetched = true;
          $('.popup').detach().appendTo('.header-inner');
          var datas = $( "entry", xmlResponse ).map(function() {
            return {
              title: $( "title", this ).text(),
              content: $("content",this).text(),
              url: $( "url" , this).text()
            };
          }).get();
          var $input = document.getElementById(search_id);
          var $resultContent = document.getElementById(content_id);
          $input.addEventListener('input', function(){
            var matchcounts = 0;
            var str='<ul class=\"search-result-list\">';
            var keywords = this.value.trim().toLowerCase().split(/[\s\-]+/);
            $resultContent.innerHTML = "";
            if (this.value.trim().length > 1) {
              // perform local searching
              datas.forEach(function(data) {
                var isMatch = false;
                var content_index = [];
                var data_title = data.title.trim().toLowerCase();
                var data_content = data.content.trim().replace(/<[^>]+>/g,"").toLowerCase();
                var data_url = decodeURIComponent(data.url);
                var index_title = -1;
                var index_content = -1;
                var first_occur = -1;
                // only match artiles with not empty titles and contents
                if(data_title != '') {
                  keywords.forEach(function(keyword, i) {
                    index_title = data_title.indexOf(keyword);
                    index_content = data_content.indexOf(keyword);
                    if( index_title >= 0 || index_content >= 0 ){
                      isMatch = true;
                      if (i == 0) {
                        first_occur = index_content;
                      }
                    }

                  });
                }
                // show search results
                if (isMatch) {
                  matchcounts += 1;
                  str += "<li><a href='"+ data_url +"' class='search-result-title'>"+ data_title +"</a>";
                  var content = data.content.trim().replace(/<[^>]+>/g,"");
                  if (first_occur >= 0) {
                    // cut out 100 characters
                    var start = first_occur - 20;
                    var end = first_occur + 80;
                    if(start < 0){
                      start = 0;
                    }
                    if(start == 0){
                      end = 50;
                    }
                    if(end > content.length){
                      end = content.length;
                    }
                    var match_content = content.substring(start, end);
                    // highlight all keywords
                    keywords.forEach(function(keyword){
                      var regS = new RegExp(keyword, "gi");
                      match_content = match_content.replace(regS, "<b class=\"search-keyword\">"+keyword+"</b>");
                    });

                    str += "<p class=\"search-result\">" + match_content +"...</p>"
                  }
                  str += "</li>";
                }
              })};
            str += "</ul>";
            if (matchcounts == 0) { str = '<div id="no-result"><i class="fa fa-frown-o fa-5x" /></div>' }
            if (keywords == "") { str = '<div id="no-result"><i class="fa fa-search fa-5x" /></div>' }
            $resultContent.innerHTML = str;
          });
          proceedsearch();
        }
      });}

    // handle and trigger popup window;
    $('.popup-trigger').click(function(e) {
      e.stopPropagation();
      if (isfetched == false) {
        searchFunc(path, 'local-search-input', 'local-search-result');
      } else {
        proceedsearch();
      };
    });

    $('.popup-btn-close').click(function(e){
      $('.popup').hide();
      $(".popoverlay").remove();
      $('body').css('overflow', '');
    });
    $('.popup').click(function(e){
      e.stopPropagation();
    });
  </script>


  

  

  

  


</body>
</html>
